The surfacing flange is a composite flange made of carbon steel or alloy steel and lined with stainless steel, titanium alloy, copper, aluminum and other corrosion-resistant alloy metals with a thickness of (generally 2-3 mm) on the inner hole surface and flange sealing surface. This kind of structure makes it take into account the pressure resistance of carbon steel and corrosion resistance of stainless steel as well as the characteristics of relatively low cost compared with stainless steel It is widely used in water supply industry and chemical industry.
The surfacing flange comprises a flange body and a flange cover, which is characterized in that the flange body is provided with a flow channel, One end of the flange body is provided with a boss, and the other end is provided with a trapezoidal groove matched with the flange cover. The flange cover is installed in the trapezoidal groove and welded with the flange body. The integrated flange is improved by welding the flange body and the flange cover, and a layer is coated on the flow channel wall of the flange body The defects such as easy leakage and insufficient adhesion of integral flange in the prior art are solved.
